Delivery devices and methods for heart valve repair
View Patent ↗Devices, systems and methods facilitate positioning of a cardiac valve annulus treatment device, thus enhancing treatment of the annulus. Methods generally involve advancing an anchor delivery device through vasculature of the patient to a location in the heart for treating the valve annulus, contacting the anchor delivery device with a length of the valve annulus, delivering a plurality of coupled anchors from the anchor delivery device to secure the anchors to the annulus, and drawing the anchors together to circumferentially tighten the valve annulus. Devices generally include an elongate catheter having at least one tensioning member and at least one tensioning actuator for deforming a distal portion of the catheter to help it conform to a valve annulus. The catheter device may be used to navigate a subannular space below a mitral valve to facilitate positioning of an anchor delivery device.
1. A method for delivering a cinchable assembly to heart tissue comprising:
deploying a first anchor into internal ventricular wall tissue of a left ventricle at or adjacent to an intersection of a mitral valve leaflet and the ventricular wall tissue, wherein the first anchor does not penetrate into a left atrium and, wherein the first anchor is coupled to a tether;
deploying a second anchor into internal ventricular wall tissue of the left ventricle at or adjacent to an intersection of a mitral valve leaflet and the ventricular wall tissue, wherein the second anchor does not penetrate into the left atrium and, wherein the second anchor is coupled to the tether; and
tensioning the tether to reduce the distance between the first and second anchors, wherein at least one force distributing member is positioned along the tether between the first and second anchors.
2. The method of claim 1 , wherein the first and second anchors are deployed while the heart is beating.
3. The method of claim 1 , wherein the first and second anchors are deployed while the heart is stopped.
4. The method of claim 1 , wherein at least one of the first and second anchors is configured to self-secure into tissue.
5. The method of claim 1 , wherein at least one of the first and second anchors is slidably coupled to the tether.
6. The method of claim 1 , wherein the force distributing member comprises a generally tubular member.
7. The method of claim 6 , wherein the tether passes through the generally tubular member.
8. The method of claim 1 , wherein the force distributing member has a textured outer surface.
9. The method of claim 1 , wherein the force distributing member is nonporous.
10. The method of claim 1 , wherein the force distributing member is porous.
11. The method of claim 10 , wherein the pores of the force distributing member are formed by cutouts in the force distributing member.
12. The method of claim 1 , wherein the force distributing member comprises a woven or braided material.
13. The method of claim 1 , wherein the force distributing member reduces the resultant force applied to at least one of the first or second anchors when the tether is under longitudinal tension, the resultant force being in the same direction as the pull out force of the anchor.